Description

Polymethylenepolyphenylene Isocyanate Polymer With α-Methyl-ω- Hydroxypoly(Oxy-1,2-Ethanediyl) is a specialized polymeric isocyanate, a key reactive component in advanced polyurethane systems. Its primary value lies in its ability to form high-performance, cross-linked polymer networks with excellent mechanical properties and chemical resistance. This product is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking durable and versatile material solutions.

Application

• High-Performance Polyurethane Coatings: Used as a curing agent in industrial, marine, and protective coatings for metals, concrete, and plastics, providing exceptional durability, gloss, and chemical resistance.
• Elastomer Production: Serves as a key isocyanate component in the manufacture of cast, millable, and thermoplastic polyurethane elastomers for demanding applications like seals, gaskets, and wheels.
• Adhesives and Sealants: Formulated into high-strength structural adhesives and flexible sealants for the automotive, construction, and aerospace sectors.
• Composite Materials: Acts as a matrix resin or binder in fiber-reinforced composites, contributing to high strength-to-weight ratios.
• Binder Systems: Utilized in foundry core binders and abrasive wheel manufacturing for its strong binding capabilities and thermal stability.
• Flexible and Rigid Foams: Can be formulated into specialized foam systems requiring specific mechanical or insulation properties.

Basic Information

Product Name	Polymethylenepolyphenylene Isocyanate Polymer With α-Methyl-ω- Hydroxypoly(Oxy-1,2-Ethanediyl)
CAS No.	70644-56-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polymeric MDI prepolymer; PMDI prepolymer; Isocyanate-terminated polyether prepolymer; Polymeric methylene diphenyl diisocyanate prepolymer; Polyurethane prepolymer; MDI-based prepolymer; Polyether-modified polymeric isocyanate; Reactive polyurethane intermediate
EINECS	Contact for details

Quality Control

Our production of Polymethylenepolyphenylene Isocyanate Polymer adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including measurement of NCO content, viscosity, and hydrolyzable chlorine, to ensure consistency and performance. Certificates of Analysis (COA) documenting full specifications are available for every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C / 59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept sealed under a dry atmosphere (e.g., nitrogen blanket) after opening to prevent reaction with atmospheric moisture, which can cause gelation or loss of reactivity. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Clear, pale yellow to amber liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	Contact for details
Hydrolyzable Chlorine	Contact for details
Color (Gardner)	≤ 3

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.